. >> is there a a growing sense of awareness for consumers and all kinds of environments looking at these products and the warnings you are offering here. >> i think so. >> whether it's using mercury a amau amalgus. amalgum. >> ing an bang wil bangladesh de regulations but they are not enforced as they should be. >> it's not just bangladesh there are other countries. that is a good point one reason we close bang wil bangladesh iss typical to what is happening in pakistan and india and ca cambodia. it's not unique to ban banglade. >> coming up next here getting schooled. weigheweighing the students ande who is not making the grade. on techknow, our scientists bring you a sneak-peak of the future, and take you behind the scenes at our evolving world. techknow - ideas, invention, life. >> now a snapshot of stories making headlines on america tonight of the. >> the investigation of the fatal new york train derailment is centering on the engineer. the officials say william rockefeller caught himself nodding off before the derailment. the train was moving 50 miles-per-hour over the speeding lim